Improving the efficiency of dye-sensitized solar cells by photoanode surface modifications

光阳极表面修饰以提高染料敏化太阳电池效率（英文）

Dye-sensitized solar cells(DSSCs) provide a promising alternative solar cell technology because of their high efficiency, environmental friendliness, easy fabrication,and low cost. Power conversion efficiency is an important parameter to measure the performance of DSSCs, but the severe charge recombination that occurs at the photoanode hinders the future improvement of power conversion efficiency. Therefore, one of the key goals for achieving high efficiency is to reduce the energy loss caused by the unwanted charge recombination at various interfaces. From this perspective, surface modification of the photoanode is the simplest method among the various approaches available in the literature for enhancing the performance of DSSCs by inhibiting the interfacial charge recombination. After some brief notes on DSSCs, in this review, we present a comprehensive discussion on surface modifications of different photoanodes that have been adopted in the literature not only for reducing recombination but also for enhancing light harvesting. Depending on the electrode materials, we discuss surface modifications of binary oxides such as TiO_2 and ZnO and ternary oxides, including Zn_2SnO_4, SrSnO_3, and BaSnO_3.We also talk about methods of surface modification and the materials suitable for surface treatment. Finally, we end with a brief future outlook of DSSCs.

染料敏化太阳电池因其高效率、环境友好、制作工艺简单、生产成本低等优点而极具应用前景.光电转换效率是衡量染料敏化太阳电池性能的重要参数之一,然而光阳极上发生的电子复合阻碍了光电转换效率的进一步提高.因此,减少由各个界面处不利的电子复合引起的能量损失是提高光电转换效率的关键之一.从这个方面来说,光阳极表面修饰是抑制界面电子复合以提高染料敏化太阳电池光电转换效率的最简便方法之一.这篇综述简单地介绍了染料敏化太阳电池的工作原理,综合讨论了目前文献中所采用的不同光阳极的表面修饰方法.这些表面修饰方法不仅能减少电子复合,还能提高对太阳光的吸收.根据光阳极材料的特点,本文讨论了二元氧化物,例如TiO_2和ZnO,以及包括Zn_2SnO_4、SrSnO_3和BaSnO_3在内的三元氧化物的表面修饰.此外,本文讨论了表面修饰的具体方法以及适用于表面处理的材料.最后,展望了染料敏化太阳电池的发展前景.